Odds ratios (95% confidence intervals) for pupil level variables from individual level logistic regression models: daily smoking and weekly smoking
| Daily smoking | Weekly smoking | |||
| Sex | ||||
| Boy | 1.00 | 1.00 | ||
| Girl | 1.58 | (1.12 to 2.23) | 1.74 | (1.24 to 2.43) |
| Mother smokes? | ||||
| No | 1.00 | 1.00 | ||
| Yes | 1.65 | (1.20 to 2.27) | 1.40 | (1.00 to 1.96) |
| Best friend smokes? | ||||
| No | 1.00 | 1.00 | ||
| Yes, sometimes | 2.36 | (1.11 to 5.04) | 5.54 | (3.45 to 8.90) |
| Yes, daily | 29.61 | (18.27 to 47.99) | 27.58 | (19.04 to 39.94) |
| Parents expect too much at school? | ||||
| No | 1.00 | 1.00 | ||
| Yes | 1.82 | (1.21 to 2.74) | 2.23 | (1.55 to 3.22) |
| Alienation score (OR per unit increase) | 1.41 | (1.17 to 1.70) | 1.39 | (1.19 to 1.62) |